Enrollment
462
Connecticut · 2024-25 NCES data
Other / mixed grade configuration · Waterbury, CT
Gilmartin School
Federal NCES profile for Gilmartin School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 22/100.
2024-25 NCES dataOther / mixed grade configurationNCES 090483000976
👥 S:T ratio 44
🌟 Gifted program 30
🎓 Counselors 8
📋 Attendance 7
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Gilmartin School earns 22/100 on the Resource Investment Index, with class sizes larger than 85% of Connecticut schools.
- #18 of 21
- schools in Waterbury · Resource Index
- 22
- Resource Index · Lower
- 14:1
- large classes for Connecticut
- 75.8%
- free-lunch eligible
Gilmartin School has class sizes larger than 85% of Connecticut schools. Computed live against every Connecticut school reporting to NCES.
By Resource Investment Index, Gilmartin School ranks #18 of 21 schools in Waterbury, CT.
School address
District: Waterbury School District · Connecticut
NCES ID 090483000976 Verify on NCES CCD record →
Teachers (FTE)
33.0
Federal CCD staff survey
Students per teacher
14:1
vs 12.1:1 Connecticut avg
+16% vs state
Free-lunch eligible
75.8%
vs 36.4% Connecticut avg
+108% vs state
Student-teacher ratio in context
How Gilmartin School compares with Connecticut and U.S. medians
What stands out at Gilmartin School
Gilmartin School is a high-poverty, mid-sized combined-grade school in Waterbury, Connecticut, enrolling 462 students.
Class loads run somewhat heavier than typical: 14:1 puts it in the larger third of Connecticut schools by student-teacher ratio.
Economic need is high: 75.8% of students qualify for free meals, 108% above the Connecticut average, a Title I-weighted population that federal funding formulas prioritise.
With 462 students, its enrollment sits close to the Connecticut median campus size.
Its Resource Investment Index trails 98% of the 1,003 Connecticut schools with a score on record, one of the lower results on this measure.
Among 113 similarly sized, similarly resourced-need Connecticut schools statewide, it ranks #104, in the lower tier once campus size and economic need are matched.
Its student body is led by Hispanic or Latino (68%) and African American (17%) (diversity index 50/100).
Counselor access is stretched at roughly 462 students per counselor, well above the ASCA-recommended 250:1 ceiling.
Chronic absenteeism is elevated: 37.4% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
The surrounding Waterbury School District spends $18,981 per pupil, 20% below the Connecticut average, a leaner-resourced district than most.
Among Waterbury's public schools, it stands alongside Waterbury Arts Magnet School (820 students): Gilmartin School is smaller than that campus by headcount and runs leaner classes (14:1 vs 16.7:1).
Waterbury School District also operates Crosby High School (1,453 students) and John F. Kennedy High School (1,391 students) alongside Gilmartin School.
Sourced from NCES CCD, CRDC, and F-33 (federal records, not a quality verdict). How we source and compute this.
Source: National Center for Education Statistics Common Core of Data + CRDC + F-33 · 2024-25
How Gilmartin School compares
Gilmartin School on the metrics families compare, against Connecticut and U.S. means.
| Metric | This school | vs Connecticut | Connecticut avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 14:1 | ▲ 16% | 12.1:1 | 15.7:1 |
| Free-lunch eligible | 75.8% | ▲ 108% | 36.4% | 51.7% |
| Enrollment | 462 | top 39% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
14:1
Leaner classes than 57% of US schools, a middle-of-the-pack class size.
462
Bigger than 57% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
75.8%
free-lunch eligible
- 108% above the Connecticut average of 36.4%
Well above the 40% Title I schoolwide threshold, among the highest-need profiles in the state; federal funds support the whole school, not individual students.
Staffing depth
14:1
students per teacher
- 16% above state mean
Top 85% in Connecticut - lower ratio than 15% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
37.4%
chronically absent (missed 10%+ of school days)
At or above 20%, the commonly used threshold for "high" chronic absenteeism, signaling significant barriers to regular attendance.
Funding equity
$18,981
per pupil, district-wide
- below Connecticut avg of $23,870
Somewhat above the U.S. public-school average, reflecting higher local or state investment per enrolled student.
Support staff
Counselors1.0 FTE
Per 462 students, the combined health-and-guidance staffing load for this school.
Discipline context
7
in-school suspensions + 26 out-of-school
Suspension rate: 1.5 per 100 students. Combined in-school and out-of-school rate: 7.1 per 100 students. Reported via the Civil Rights Data Collection.
Overview
- Common Core of Data (June 2026): enrollment, staffing, and the student-teacher ratio above.
- Civil Rights Data Collection: discipline counts and program access (AP, gifted, special education).
- F-33 School District Finance Survey: the district-wide per-pupil spending figures below.
Three separate federal collections, each on its own reporting cadence - which is why this school's numbers line up on a consistent basis against every other school and state on this site, rather than mixing figures pulled from different survey years.
Student demographics
Hispanic or Latino 68.4%
African American 17.3%
White 5.6%
Asian 3.9%
Two or More 3.7%
American Indian / Alaska Native 1.1%
Largest group: Hispanic or Latino at 68.4% of enrollment.
Student-body diversity index 49.6/100
Simpson diversity index - at 49.6, Gilmartin School is about as mixed as the Connecticut school average of 50.5.
Programs
Funding & spending
District-wide per-pupil expenditure for Waterbury School District, which includes Gilmartin School.
$18,981
Per student
-20%
vs Connecticut
Avg $23,870
+14%
vs U.S.
Avg $16,593
Revenue mix
Local 23.5%
State 63.9%
Federal 12.6%
Source: NCES F-33 School District Finance Survey District-level finance · FY 2021-22 Per-pupil expenditure reflects the district-wide average. Individual school budgets are not reported at the federal level.
How Gilmartin School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Crosby High School | Larger | Similar economic need | Higher S:T ratio |
| John F. Kennedy High School | Larger | Similar economic need | Higher S:T ratio |
| Wilby High School | Larger | Similar economic need | Similar S:T ratio |
| Michael F. Wallace Middle School | Larger | Similar economic need | Lower S:T ratio |
| West Side Middle School | Larger | Similar economic need | Lower S:T ratio |
Comparisons are relative to Gilmartin School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,453
- Students per teacher
- 16.5:1
- Resource Index
- 26/100
- Enrollment
- 1,391
- Students per teacher
- 15.5:1
- Resource Index
- 35/100
- Enrollment
- 1,196
- Students per teacher
- 15.1:1
- Resource Index
- 30/100
- Enrollment
- 1,059
- Students per teacher
- 11.5:1
- Resource Index
- 38/100
- Enrollment
- 848
- Students per teacher
- 10.2:1
- Resource Index
- 37/100
Similar other schools in Waterbury
6 comparable other schools (grades Mixed) serving the same city.
Waterbury Arts Magnet School
Standard public school
820 students 16.7:1 students per teacher
Rotella Interdistrict Magnet School
Standard public school
614 students 17.1:1 students per teacher
Wendell L. Cross School
Standard public school
606 students 16.4:1 students per teacher
Maloney Interdistrict Magnet School
Standard public school
590 students 14:1 students per teacher
B. W. Tinker School
Standard public school
578 students 18.6:1 students per teacher
H. S. Chase School
Standard public school
543 students 10.6:1 students per teacher
Similar other schools statewide
Matched by enrollment size and by staffing ratio across all of Connecticut, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~462 students)
Next steps
Verify locally before acting on Gilmartin School's federal record.
- Compare Gilmartin School against another school. Compare schools
- Waterbury School District's spending and staffing shape this school. District profile
- Confirm current enrollment and boundaries with the school. Choosing guide
Federal record (CCD 2024-25, CRDC 2021-22) - PlainSchools assigns no subjective rating; the composite quality score is a transparent, reproducible index computed from this cited federal data.
Frequently asked questions about Gilmartin School
How many students attend Gilmartin School?
Gilmartin School has 462 students enrolled. It is a public school in Waterbury, CT.
What is the student-teacher ratio at Gilmartin School?
The student-teacher ratio at Gilmartin School is 14:1, which is 16% higher than the Connecticut average of 12.1:1 and 11% lower than the national average of 15.7:1.
What percentage of students receive free lunch at Gilmartin School?
75.8% of students at Gilmartin School are eligible for free lunch, compared to the Connecticut average of 36.4%.
What is the racial and ethnic makeup of Gilmartin School?
The largest demographic group at Gilmartin School is Hispanic or Latino at 68.4% of enrollment, in Waterbury, CT.
What is the Resource Investment Index for Gilmartin School?
Gilmartin School has a Resource Investment Index of 22/100 (lower reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, counselor availability, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Gilmartin School rank among schools in Waterbury?
By Resource Investment Index, Gilmartin School ranks #18 of 21 schools in Waterbury, CT. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all schools in Waterbury on the city page.
Is Gilmartin School a good school?
Gilmartin School earns 22/100 on the Resource Investment Index, with class sizes larger than 85% of Connecticut schools. This is a resource snapshot, not an academic rating; see the Resource Investment Index question above for what the number does and doesn't measure.
What other schools are in Waterbury School District?
Besides Gilmartin School, Waterbury School District also operates Crosby High School (1,453 students), John F. Kennedy High School (1,391 students), and Wilby High School (1,196 students). See the Waterbury School District district page for the complete list.
Related tools
Every figure on PlainSchools is rendered directly from the source NCES, CRDC and F-33 federal records, no number is typed in by an editor. Each school's figures reflect its most recent NCES/CRDC submission on file. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of June 2026.